select if 内的模型值未定义按钮

Question

我有一个问题，我无法从 ng-if 中的 ng-model 获取值。如果我提醒模型结果是未定义的。这是我的 html 文件

<div class="col-sm-2">
            <select class="form-control" ng-model="yayaya">
                <option value="1">yeyeyeye</option>

            </select>
        </div>
        <div class="col-sm-2" ng-if="yayaya ==='1'">
            <select class="form-control" ng-model="yoyoyo">
                <option value="bla">blabla</option>
                        </select>
        </div>

这是我提醒 ng-model 时的结果

Answer 1

需要ng-change获取模型值，可以如下传递，

演示版

var app = angular.module('testApp',[]);
app.controller('testCtrl',function($scope){
    $scope.show = function(yo) {
      alert(yo);
    }
    
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<body ng-app="testApp" ng-controller="testCtrl">
<div class="col-sm-2">
            <select class="form-control" ng-model="yayaya">
                <option value="1">yeyeyeye</option>

            </select>
        </div>
        <div class="col-sm-2" ng-if="yayaya ==='1'">
            <select ng-change="show(yoyoyo)" class="form-control" ng-model="yoyoyo">
                <option value="bla">blabla</option>
            </select>
 </div>
 </body>

select if 内的模型值未定义按钮

select button ng model value undefined inside ng if

javascript

angularjs

angular-ui-bootstrap